AQUAMARINE
Aquamarine
Beryl
Blue beryl with a sea-like color. It shares a mineral species with emerald, while its color and inclusion characteristics differ.
GEM PROFILE
Basic properties
- Mineral or material
- Beryl
- Main chemical composition
- Be₃Al₂Si₆O₁₈
- Crystal & structure
- Hexagonal
Hexagonal prisms can grow into large, transparent crystals.
- Typical colors
- Pale blue to greenish blue
- Mohs hardness
- 7.5–8
A measure of scratch resistance, distinct from resistance to impact or breakage.
About hardness and durability - Representative sources
Examples of known sources. Determining the origin of an individual stone requires examination and comparison with reference material.
- Common cutting styles
- Rectangular step cuts, ovals, pears and other shapes.
Explore cutting styles
LOOK A LITTLE CLOSER
What to observe
Light colors can appear different against different backgrounds and lighting. Pleochroism means the orientation of the rough affects the finished appearance.
TREATMENT & CARE
Treatments & care
Treatments & identification
Heating may be used to reduce the green component and bring out a bluer appearance.
Everyday care
Gently wash with lukewarm water and mild detergent. Avoid ultrasonic or steam cleaning when fractures or filling have not been ruled out.
Cleaning depends on treatment, inclusions and mounting. If a stone's condition is unknown, ask your jeweler or a gem specialist before cleaning.
READING & REFERENCES
References
Public sources for learning about this gemstone's general properties.
- GIA · Gemological reference
- GIA · Care & Cleaning
- Handbook of Mineralogy · Mineral data (PDF)
- GIA · Gem sources and fundamentals
This dictionary provides general educational information. Values are representative and do not identify or grade an individual stone. Locality examples include historical deposits.
Sources checked: October 19, 2026